Template synthesis of metal tungsten nanowire bundles with high field electron emission performance
Author(s)
Liu, Y
Lan, K
Es-Saheb, MH
Elzatahry, AA
Zhao, D
Griffith University Author(s)
Year published
2016
Metadata
Show full item recordAbstract
One-dimensional (1D) metal nanowires are of great importance for nanodevices due to their distinctive optical, electronic and mechanical properties. Here, for the first time, we report a simple H2 reduction-assisted hard-templating approach to fabricate metallic tungsten (W) nanowire bundles by using mesoporous silica SBA-15 as a template. The metal W nanowires with a length of 300-500 nm and diameter of 5-8 nm have long-range regularity over large areas because of their inter-wire pillar connections. Each nanowire has body-centred cubic (bcc)-W crystalline structure with a [110] preferential growth direction. As a field ...
View more >One-dimensional (1D) metal nanowires are of great importance for nanodevices due to their distinctive optical, electronic and mechanical properties. Here, for the first time, we report a simple H2 reduction-assisted hard-templating approach to fabricate metallic tungsten (W) nanowire bundles by using mesoporous silica SBA-15 as a template. The metal W nanowires with a length of 300-500 nm and diameter of 5-8 nm have long-range regularity over large areas because of their inter-wire pillar connections. Each nanowire has body-centred cubic (bcc)-W crystalline structure with a [110] preferential growth direction. As a field electron emitter, the W nanowires bundles show a low turn-on field of 4.1 V μm-1, a high field enhancement factor up to 3563 and good field emission stability (with a fluctuation below 5% over 32 h).
View less >
View more >One-dimensional (1D) metal nanowires are of great importance for nanodevices due to their distinctive optical, electronic and mechanical properties. Here, for the first time, we report a simple H2 reduction-assisted hard-templating approach to fabricate metallic tungsten (W) nanowire bundles by using mesoporous silica SBA-15 as a template. The metal W nanowires with a length of 300-500 nm and diameter of 5-8 nm have long-range regularity over large areas because of their inter-wire pillar connections. Each nanowire has body-centred cubic (bcc)-W crystalline structure with a [110] preferential growth direction. As a field electron emitter, the W nanowires bundles show a low turn-on field of 4.1 V μm-1, a high field enhancement factor up to 3563 and good field emission stability (with a fluctuation below 5% over 32 h).
View less >
Journal Title
RSC Advances
Volume
6
Issue
67
Subject
Chemical sciences